121335255 has 24 divisors (see below), whose sum is σ = 211397472. Its totient is φ = 64378944.

The previous prime is 121335251. The next prime is 121335257. The reversal of 121335255 is 552533121.

It is a happy number.

121335255 is a `hidden beast` number, since 1 + 2 + 133 + 525 + 5 = 666.

It is not a de Polignac number, because 121335255 - 2² = 121335251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121335251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2022 + ... + 15708.

It is an arithmetic number, because the mean of its divisors is an integer number (8808228).

Almost surely, 2^121335255 is an apocalyptic number.

121335255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121335255 is a deficient number, since it is larger than the sum of its proper divisors (90062217).

121335255 is a wasteful number, since it uses less digits than its factorization.

121335255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13895 (or 13892 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 121335255 is about 11015.2283226450. The cubic root of 121335255 is about 495.0651276413.

Adding to 121335255 its reverse (552533121), we get a palindrome (673868376).

The spelling of 121335255 in words is "one hundred twenty-one million, three hundred thirty-five thousand, two hundred fifty-five".